<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<input type="button" value="显示图片" id="btn"/>
<img src="" alt="" id="im">
<script>
    var btnObj = document.getElementById("btn");
    btnObj.onclick = function () {
        var imObj = document.getElementById("im");
        imObj.src = "../images/图层133.png";
        imObj.width = "300";
        imObj.height = "400";
    };

</script>
</body>
</html>